!! OMG, his butt: Mathew Horne !!
I only really know British actor Mathew Horne from his recurring role on The Katherine Tate Show (hilarious sketch comedy from the UK), and he definitely doesn't show any skin there, but he did in a previous role on the television series Roman's Empire.
See Mathew standing naked an embarrassed in the conference after the jump! (NSFW)
Click to enlarge.
(Thanks to CB for the image!)